Quite a while ago, I worked for a bit in Norway. Almost everyone there seemed fit. When I commented on it, my coworkers said it was kind of an in-joke that Am

Quite a while ago, I worked for a bit in Norway. Almost everyone there seemed fit. When I commented on it, my coworkers said it was kind of an in-joke that Americans came in two types. There's a small minority of younger fitness junkies, who often look unhealthily thin, and then a much larger number of people who are distinctly overweight. I've never seen anything to contradict that "bimodal distribution" idea. It's one reason that I take diet or exercise advice based on what worked for one guy in his twenties with a huge grain of salt (heh). Come back when you're forty, and we'll talk. Better yet, let's try looking at large-scale peer-reviewed studies of what works and what doesn't across ages and genders, instead of spreading anecdotes and flimsy theories.